:root{--ink:#13140F;--paper:#F4F1EA;--paper2:#ECE7DC;--copper:#C9A45C;--moss:#4F6B4A;--brick:#A8442A;--line:#D9D2C3;--mut:#6B675D;--card:#FBF9F4;--r:14px}
*{box-sizing:border-box}html,body{margin:0;background:var(--paper);color:var(--ink);font:15px/1.6 "Be Vietnam Pro",system-ui,sans-serif}
button,input,select,textarea{font:inherit;color:inherit}
.wrap{max-width:980px;margin:0 auto;padding:clamp(16px,4vw,32px) clamp(14px,4vw,32px) 80px}
.lab{font-family:"JetBrains Mono",ui-monospace,monospace;font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:#8a6d2f}
h1{font-family:"Be Vietnam Pro",system-ui,sans-serif;letter-spacing:-.01em;font-weight:600;font-size:clamp(30px,4vw,44px);line-height:1.08;margin:6px 0 8px}
h2,h3{font-family:"Be Vietnam Pro",system-ui,sans-serif;letter-spacing:-.01em;font-weight:600;margin:0 0 10px}h2{font-size:24px}h3{font-size:18px}
.sub{color:var(--mut);margin:0 0 20px;max-width:640px}
.hide{display:none!important}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:18px;margin-bottom:14px}
.f{display:block;font-size:13px;color:var(--mut);margin:10px 0 5px}
input,select,textarea{width:100%;border:1px solid var(--line);border-radius:10px;background:#fff;padding:10px 12px;min-height:44px}
textarea{resize:vertical}
input:focus,select:focus,textarea:focus{outline:2px solid var(--copper);outline-offset:1px}
.row{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,180px),1fr));gap:10px}
.go{margin-top:14px;width:100%;height:50px;border:0;border-radius:999px;background:var(--ink);color:var(--paper);font-weight:600;font-size:16px;cursor:pointer}
.go:disabled{opacity:.5;cursor:wait}
.btn2{border:1px solid var(--ink);background:transparent;border-radius:999px;padding:7px 14px;cursor:pointer;font-size:13px;min-height:38px}
.btn2.red{border-color:var(--brick);color:var(--brick)}
.note{font-size:12.5px;color:var(--mut);margin:8px 2px 0}.warn{font-size:13px;color:var(--brick);margin:8px 2px 0;min-height:1em}
.small{font-size:13.5px;color:#3d3b35}.ck{display:flex;gap:10px;align-items:flex-start;margin:10px 0;font-size:14px;cursor:pointer}.ck input{width:20px;min-height:20px;margin-top:3px;flex:none}
.kids{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}
.kid{border:1px solid var(--line);background:#fff;border-radius:999px;padding:6px 14px;cursor:pointer;min-height:40px}.kid.on{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:14px;overflow-x:auto}
.tabs button{border:0;background:transparent;padding:10px 14px;cursor:pointer;border-bottom:2px solid transparent;white-space:nowrap;color:var(--mut)}
.tabs button.on{border-color:var(--ink);color:var(--ink);font-weight:600}
.quick{display:flex;gap:6px;flex-wrap:wrap;margin:8px 0 0}.quick button{border:1px dashed #BDB39F;background:transparent;border-radius:999px;padding:3px 11px;font-size:13px;cursor:pointer}
.ans{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:18px;margin-bottom:14px}
.ans .qq{font-size:13.5px;color:var(--mut);border-left:3px solid var(--copper);padding-left:10px;margin-bottom:12px;white-space:pre-wrap}
.ans h4{margin:14px 0 4px;font-size:14.5px}.ans ul{margin:0;padding-left:20px}.ans li{margin:3px 0}
.talk li{font-style:italic}
.src{font-size:12.5px;color:var(--mut);margin-top:12px;border-top:1px dashed var(--line);padding-top:8px}.src a{color:#6b5320}
.dis{font-size:12px;color:var(--mut);margin-top:8px}
.meta{font-size:12px;color:var(--mut);margin-top:6px}
/* canh bao 3 muc */
.wn{border-radius:12px;padding:14px 16px;margin:10px 0;border:2px solid}
.wn b.t{display:block;font-size:15.5px;margin-bottom:4px}
.wn.l1{background:#fdf7e3;border-color:#d9b44a}.wn.l1 b.t{color:#7a5a07}
.wn.l2{background:#fdeee2;border-color:#d97a2b}.wn.l2 b.t{color:#8a3f06}
.wn.l3{background:#fde8e6;border-color:#c0261b;color:#5a0d07}.wn.l3 b.t{color:#b0170c;font-size:18px}
.wn .why{font-size:13.5px;margin:4px 0}.wn ol{margin:6px 0 0;padding-left:20px}.wn li{margin:4px 0}
.hot{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0 4px}.hot a{background:#c0261b;color:#fff;text-decoration:none;font-weight:700;border-radius:999px;padding:9px 16px;font-size:16px}
.jrow{display:flex;justify-content:space-between;gap:10px;padding:10px 2px;border-top:1px solid var(--line);font-size:14px}
.jrow .d{font-family:"JetBrains Mono",monospace;font-size:12px;color:var(--mut);white-space:nowrap}
.pill{display:inline-block;font-size:11.5px;border-radius:999px;padding:1px 8px;margin-left:6px}.pill.l1{background:#f3e3a8}.pill.l2{background:#f6c49a}.pill.l3{background:#c0261b;color:#fff}
.danger{border-color:#e3b3aa}
.disc{font-size:12.5px;color:var(--mut);border-top:1px solid var(--line);margin-top:26px;padding-top:12px}
.empty{color:var(--mut);text-align:center;padding:26px;background:var(--paper2);border-radius:12px}

/* ===== Ban Dong Hanh ===== */
.angles{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,150px),1fr));gap:8px;margin-bottom:14px}
.ang{display:flex;gap:8px;align-items:center;border:1px solid var(--line);background:#fff;border-radius:14px;padding:10px 12px;cursor:pointer;text-align:left;font-weight:600;font-size:14px;min-height:52px}
.ang span{font-size:20px}
.ang.on{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.bothead{display:flex;gap:10px;align-items:center;margin-bottom:10px}
.ava{width:40px;height:40px;border-radius:50%;background:#E7EEF3;display:grid;place-items:center;font-size:20px;flex:none}
.bub.me{margin:16px 0 6px auto;max-width:85%;background:var(--ink);color:var(--paper);padding:10px 14px;border-radius:16px 16px 4px 16px;white-space:pre-wrap;width:fit-content}
.ans.bot{border-radius:4px 16px 16px 16px}
.persp{background:#EEF3EC;border-radius:12px;padding:10px 14px;margin:10px 0}.persp p{margin:4px 0 0}
.qs li{font-weight:500}
.aiNote{background:#E7EEF3;border-radius:10px;padding:8px 12px;font-size:13px;margin:0 0 10px;color:#22394a}
.alertbar{background:#fde8e6;border:2px solid #c0261b;border-radius:12px;padding:12px 16px;margin-bottom:14px;color:#5a0d07}.alertbar a{color:#b0170c;font-weight:700}
.mbtn{display:flex;gap:6px;align-items:flex-start;flex-wrap:wrap;justify-content:flex-end}
.jrow.mem .mt{font-size:14.5px}
/* giao dien tuoi teen */
body.teen{--paper:#F6F3FF;--card:#FFFFFF;--line:#E2DAF7;--ink:#3B2A7A;--copper:#FF8A65}
body.teen h1{color:#3B2A7A}
body.teen .ang.on{background:linear-gradient(135deg,#6C4BD8,#FF7A9A);border-color:transparent}
body.teen .go{background:linear-gradient(135deg,#6C4BD8,#FF7A9A);border-radius:16px}
body.teen .bub.me{background:#6C4BD8}
body.teen .card,body.teen .ans{border-radius:20px}
body.teen .quick button{border:1px solid #CBBDF5;background:#F1ECFF;color:#3B2A7A}
body.teen .ava{background:linear-gradient(135deg,#C9B8FF,#FFC2D1)}
body.kidmode .tabs button[data-v="kids"]{display:none}
@media (prefers-reduced-motion:no-preference){.ans,.bub{animation:fi .25s ease-out}@keyframes fi{from{opacity:0;transform:translateY(4px)}to{opacity:1}}}